Questions tagged [ip-address]

IP address is a numerical label assigned to each device participating in a computer network that uses IP for communication.

An Internet Protocol address (IP address) is a numerical label assigned to each device (e.g., computer, printer) participating in a computer network that uses the Internet Protocol for communication. An IP address serves two principal functions: host or network interface identification and location addressing. Its role has been characterized as follows: "A name indicates what we seek. An address indicates where it is. A route indicates how to get there."

The designers of the Internet Protocol defined an IP address as a 32-bit number1 and this system, known as Internet Protocol Version 4 (IPv4), is still in use today. However, due to the enormous growth of the Internet and the predicted depletion of available addresses, a new addressing system (IPv6), using 128 bits for the address, was developed in 1995,[3] standardized as RFC 2460 in 1998,[4] and its deployment has been ongoing since the mid-2000s.

IP addresses are binary numbers, but they are usually stored in text files and displayed in human-readable notations, such as 172.16.254.1 (for IPv4), and 2001:db8:0:1234:0:567:8:1 (for IPv6).

The Internet Assigned Numbers Authority (IANA) manages the IP address space allocations globally and delegates five regional Internet registries (RIRs) to allocate IP address blocks to local Internet registries (Internet service providers) and other entities.

Source: Wikipedia.

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How to block website for all countries except US and Canada

I have a website which is only for US and Canada visitors. I don't want to make it visible to other visitors. I want to use Geo targeting solution but I have a amazon hosting it did return current user IP Address so is there any way to getting user…
Dileep Kumar
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What does the netmask in an IP address actually tell you?

There are several questions out there asking what the CIDR netmask is, and how it's calculated. But after reading all the top answers, I'm still left wondering, how does the netmask let us distinguish two IP addresses? For example, if I give you…
CodyBugstein
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Need to change IP addresses on 35 servers remotely

We are going through a network redesign and I have 35 Windows 2003/2008 servers at a remote location that I need to change the IP address, gateway and DNS informaiton for. Ideally I would like to be able to preform this from a command line on my…
Richard West
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Weird Requests Being Sent to My Server

I have written a server in C# for windows and it works fine. A week back I setup a dynamic domain name with No-Ip.com and now my server serves pages at the address nabeel.ddns.net. I was viewing my server log and i found two strange…
nom
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adding 2nd private IP on AWS EC2 instance

I am having problems adding a 2nd IP on AWS EC2 instance. I am running Ubuntu 14.04. I already tried this: Right clicked the instance and added a 'private IP' from the manage Private IP. Ssh'ed into the machine and added a file…
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Setting a temporary ip address and gateway on linux server

I have a linux server which needs to be set up with production ip address and hostname before installation procedures start (some scripts use these variables). I've seen somebody assigning a temporary ip address and a temporary gateway simply by…
Erik I
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What's the formal definition of the magic number of a network?

I know what the magic number of a network is. I know how to compute it - 2 ^ ((32 - n) % 8). I know what it's used for and how to use it. I don't how how to define it formally. In a recent interview I was left speechless after being asked to deliver…
Aadit M Shah
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Postfix: Allow SMTP AUTH only from specified IP address ranges

can one implement an IP address based restriction for SMTP AUTH in Postfix? Scenario: I'm running a Postfix mail server that receives mails from all over the Internet. But the server doesn't only receive mails, it also allows its authenticated…
MrSnrub
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What is this address "223.1.1.128" that ZoneAlarm blocks?

ZoneAlarm (firewall) reports blocking this address about once a day. 223.1.1.128 doesn't resolve to anything, so I tried a Web search on the number. I kept getting this site with a hyphen in its name. So I figured I should ask here. There's some…
gbarry
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How to access a site in IIS with no DNS mapping

In my IIS 7.5 hosted in a Windows Server 2008 R2 I have several websites with no DNS address assigned. Let's take for instance the site (as named in IIS) with site name mySite. I have for this site the standard binding with no host name. Suppose…
CiccioMiami
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Network Design and Implementation

I am currently designing the network in my office, which is relatively small now but it plans to grow very fast. The design is pretty much done, the problem is occurring during the implementation. So the scenario is the following: 4…
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Trusting DHCP-assigned IP addresses only

I manage a reasonably small network (150 machines or so). We have a DHCP server set up with reservations for all of the machines on the network and an exclusion zone set up over the entire range so that only known machines will get an IP address and…
Philip
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Find ISP/IP address by geographic location?

I'm trying to find an ISP or IP address by geographic location, Is this possible?
Zee Tee
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Subnetting Challenges

I am trying to plan out a network with the following requirements and am having problems trying to complete a subnet plan for my network. The network consists of 3 routers that connect 3 different buildings together. I need to subnet the entire…
John
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Deny Static IP Assignments

I am currently using a SonicWall Pro 2040 with DHCP enabled, but only with static IPs mapped to specific MAC addresses. There is no dynamic IP scope being used. Currently, no DHCP request will resolve an IP, as desired. However, if a server or…
BeepBoop
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